From Sahih Bukhari (Hadith 7054):
Narrated Ibn `Abbas:The Prophet (ﷺ) said, "Whoever notices something which he dislikes done by his ruler, then he should be patient, for whoever becomes separate from the company of the Muslims even for a span and then dies, he will die as those who died in the Pre-Islamic period of Ignorance (as rebellious sinners). (Fath-ul-Bari page 112, Vol)
Reference: Bukhari 7054